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computers / comp.sys.ibm.ps2.hardware / Re: List of IBM PS/2 Keyboard Controllers

SubjectAuthor
* List of IBM PS/2 Keyboard ControllersLouis Ohland
+- uPD80C42C-146 8-Bit, Single Chip, CMOS Microcomputer with UniversalLouis Ohland
+* 8042 and 8742Louis Ohland
|`- Re: 8042 and 8742IBMMuseum
`- Re: List of IBM PS/2 Keyboard ControllersTomas Slavotinek

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List of IBM PS/2 Keyboard Controllers

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: List of IBM PS/2 Keyboard Controllers
Date: Fri, 9 Jul 2021 11:58:33 -0500
Organization: csiph.com Internet News Service
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 by: Louis Ohland - Fri, 9 Jul 2021 16:58 UTC

For the most part, the 85xx series use a 8042AH KBC [8742AH similar].

The 8525 and 8530 use industry standard chipsets. The 8530-286 used a
8042AH.

The 8535/8540 used a 8042AH. The shift from the industry standard
chipsets to the 8042AH was a problem, as software sordid expected a more
main-stream flavor, and IBM had to do something with scan codes or
translation or shaking rubber chickens. IIRC, 8042AH was taken to equate
to the MCA bus, so an 8042AH on ISA made some software break.

Note the P75 was the first common MCA system to use an ASIC. The P70/P75
development seems to be contemporary to the T0 development. The 90 and
95 have always used an ASIC.

I just don't have a clear enough scan of the 8556 / 57 system board to
identify the KBC.

8533 N8042AH
8535 P8042AH
8540 P8042AH
8543 ASIC [WD]
8550 P8042AH
8555 P8042AH
8556 ???
8557 ???
8560 P8742AH
8565SX ???
8570 N8042AH
8573-P70 MPD80C42C-146
8573-P75 ASIC
8580 P8042AH
8590 85F0464 ASIC
8595 85F0464 ASIC

uPD80C42C-146 8-Bit, Single Chip, CMOS Microcomputer with Universal PPI Datasheet

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: uPD80C42C-146 8-Bit, Single Chip, CMOS Microcomputer with Universal
PPI Datasheet
Date: Fri, 9 Jul 2021 12:03:22 -0500
Organization: csiph.com Internet News Service
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 by: Louis Ohland - Fri, 9 Jul 2021 17:03 UTC

8-Bit, Single Chip, CMOS Microcomputer with Universal PPI

https://datasheet.datasheetarchive.com/originals/scans/Scans-007/Scans-00158489.pdf

8573-P70 MPD80C42C-146

8042 and 8742

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: 8042 and 8742
Date: Fri, 9 Jul 2021 12:12:27 -0500
Organization: csiph.com Internet News Service
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 by: Louis Ohland - Fri, 9 Jul 2021 17:12 UTC

The 8042 is mask ROM - so you can't change the firmware. The 8742 was
the EPROM version.

> 8555 P8042AH
> 8560 P8742AH

Re: 8042 and 8742

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Subject: Re: 8042 and 8742
From: ibmmus...@gmail.com (IBMMuseum)
Injection-Date: Mon, 12 Jul 2021 00:44:35 +0000
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 by: IBMMuseum - Mon, 12 Jul 2021 00:44 UTC

On Friday, July 9, 2021 at 11:18:57 AM UTC-6, Louis Ohland wrote:
> The 8042 is mask ROM - so you can't change the firmware. The 8742 was
> the EPROM version.
>
> > 8555 P8042AH
> > 8560 P8742AH

Feature Byte 2, Bit 2: http://ibmmuseum.com/Interrupts/INT15h/INT15hC0.html

The 8556/8557 have a "non-8042 Keyboard Controller": https://www.youtube.com/watch?v=VEHZFHFheR8&t=874s

The push around this time by IBM was to have models able to use the 122-key "Host Connect" keyboard for terminal emulation...

Re: List of IBM PS/2 Keyboard Controllers

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From: slavoti...@gmail.com (Tomas Slavotinek)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: List of IBM PS/2 Keyboard Controllers
Date: Mon, 12 Jul 2021 16:24:46 +0200
Organization: csiph.com Internet News Service
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 by: Tomas Slavotinek - Mon, 12 Jul 2021 14:24 UTC

9553, 9556/57, Bermuda, Lacuna, 85 "X", 85 "N", 9595A (2S2P), 5550-486 -
10G4672 (ASIC/GA)

The ASIC integrates a bunch of stuff:
-keyboard & mouse controller
-2x UART
-1x parallel
-interrupt controller
-it also probably drives the planar I/O bus

On 9.7.2021 18:58, Louis Ohland wrote:
>
> 8533 N8042AH
> 8535 P8042AH
> 8540 P8042AH
> 8543 ASIC [WD]
> 8550 P8042AH
> 8555 P8042AH
> 8556 ???
> 8557 ???
> 8560 P8742AH
> 8565SX ???
> 8570 N8042AH
> 8573-P70 MPD80C42C-146
> 8573-P75 ASIC
> 8580 P8042AH
> 8590 85F0464 ASIC
> 8595 85F0464 ASIC

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